John Ness, President & CEO

A lifelong resident of Cecil County, John Ness manages the daily operations, strategic growth, and collaborative community relationships as President & CEO of WCHC. With 26 years of business experience including finance, healthcare, and non-profit management, he oversees the daily operations of the company. John was integral in the modernization of the accounting and financial reporting and budgeting process, the addition of new service lines, and opening two new locations in Havre de Grace and Perryville while previously serving as the Chief Financial Officer for WCHC. He has also been responsible for transitioning the entire company to a fully integrated electronic medical records system. John received his B.S. in Business Administration from West Virginia University and his MBA with a concentration in Healthcare Administration from Wilmington University. He is an active member of the Medical Group Management Association, the American College of Healthcare Executives, the Mid-Atlantic Association of Community Health Centers, and the Maryland Rural Health Association.

 Leadership - Holly Chattin, COO

Holly Preston, COO

Holly Preston is responsible for the operations and compliance at WCHC in her role as Chief Operating Officer. She brings 17 years of clinical experience and 11 years of leadership experience to her role where she transitioned the entire organization to a new electronic health records system and facilitated the opening of the Perryville location. Throughout her career, Holly has established a corporate compliance program that has achieved full compliance with HRSA, CMS, HIPAA, PCI, and OSHA regulations and boasted one of the only perfect HRSA on-site visits in the nation. She has led a door-to-tPA process improvement team that received national recognition for quality improvement, and designed and implemented a Navigator program that was adopted throughout the entire MedStar Health System. Holly received her B.S. in Nursing and her M.S. in Health Services Leadership and Management with an Executive Focus. She is a professional member of the ANCC, is an ANCC Board Certified Nurse Executive, and is Juran Lean Six Sigma Yellow and Green Belt Certified. Holly lives by the words of Charles R. Swindoll, “Life is 10% what happens to you and 90% how you react to it.”

Leadership - Grace Comello, CFO

Grace Comello, CFO

Grace Comello, CPA, serves as the Chief Financial Officer of WCHC. She is responsible for all financial operations of the organization including designing business plans, budget generation, grants management, increasing revenue streams, overseeing the HR department, and ensuring accuracy and completeness of financial records and reports. Grace was instrumental in improving collection practices, policies and procedures, and financial compliance per HRSA guidelines. Grace brings 23 years of experience including 5 years with the Big Four accounting firms and 4 years of international business experience in Germany. She received her B.S. in Accounting from Xavier University, her Masters of Business Administration from Colorado State University, and is an active member of the American Institute of Certified Public Accountants. Grace is a married Army Wife with two children.

Dr. Mozella Williams, CMO

Mozella Williams, MD MBA, serves as WCHCs Chief Medical Officer with an interest in preventative healthcare, chronic disease reversal and management, women’s health (including preconception and contraception care), men’s health, including prostate concerns and low energy, and the health of adolescents and children. She also is committed to improving health care disparity. She brings 13 years of healthcare experience to the company and is responsible for supervising all aspects of the clinical department ensuring a positive patient experience and an exceptional quality of care. Dr. Williams has a passion for medical education and for several years served as an Assistant Professor and the Associate Director of Medical Student Education at the University of Maryland School of Medicine in the Department of Family and Community Medicine. She attended Morehouse School of Medicine where primary care was an early interest, and she completed her residency at the University of Maryland. She has enjoyed her career in both academics and an innovative, integrated non-profit primary care model. To enhance these efforts, she recently finished a Masters in Business Administration at the University of Maryland.